CWF HT 2+ nested structures and interfaces/boundaries

2 Comment Uncategorized

The published cwf ht procedure is a good starting/prototyping point. Changes in energy(via temperature) state are operators, where driving forces define texture and scope.

COG (Combinatorial Optimization Graph) 3rd goal – the resulting graph has low thermal expansion coefficient, especially within operation condition. Basically, saying – we want a working system in lowest potential energy well as possible. Same as saying – a working system with lowest dislocation.

As this blog’s title suggested – there are higher performance cwf ht processes. They are waiting for you to discover …

2 thoughts on “CWF HT 2+ nested structures and interfaces/boundaries”

  1. Tim Curry says:

    Hi Luong,

    I emailed you a few months ago about steel types & choices (D2, 5160). I’m working on a modified “chopper” with 5160 & would like to know how much you would charge to do a HT with your new process on this blade. It will be about 18″ long, 1/4″ thick & 2″ deep when roughed out prior to HT.

    I had the 5160, so that’s what I’ve decided to use for this shape, but don’t know if this would be a good candidate for your oven & the quench sequence you’re using.

    1 – Can you quote me a price?

    2 – What is a realistic hardness for this steel with your process & HT, if you can make an educated guess? I know it is fairly tough material, but I’m wanting it to be fairly hard also, more than the usual 59 I would expect from a conventional HT process.

    3 – I’m just starting on the blade, so I’m not ready to have the HT done yet & am in no hurry on this one, but what edge thickness should I use (BTE) for the blank to do the HT for stability.

    4 – Can I expect some warping with the process, or should it be fairly stable & hold its shape?

    Many thanks & I’ve enjoyed your thread about the HT process. I can’t say I understand it, but I’m willing to think it might be a good idea to give it a try.

    Please send an email when you can, or you can call me at ***-***-**** (masked phone# out by Luong). I live in Tucson, Az.

    1. luong says:

      Hi Tim,

      I masked out your phone# (but saved your #). Your chopper design is nice. My oven is only 18″ deep, so 17.5-17.75″ will be max length (place blade diagonally). My LN2 Dewar neck only fits 1.95″ wide.
      1. When it turns out well – pay whatever ht shop charge.
      2. 61-63rc – I might ht a test blade and see that hrc would be best for chopper (your edge geometry). I will torch soften the spine to ~58-60rc.
      3. You can pre-ht grind edge to 0.035″ (after ht – I can grind it down to your pre-sharpening specification).
      4. For this profile, keep tip-to-butt flat (don’t grind dip for handle and bow spine). I can rough grind those for you. 5160 is easy to grind post-ht.
      Thanks for following that thread. Post when you are close to ht stage.

Leave a Reply

Your email address will not be published. Required fields are marked *